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| unit PenduleBasile;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, Math, StdCtrls, Buttons;
type
TForm1 = class(TForm)
Image1: TImage;
Timer1: TTimer;
Edit1: TEdit;
Label1: TLabel;
SpeedButton1: TSpeedButton;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure SpeedButton1Click(Sender: TObject);
private
{ Déclarations privées }
bmp_Fond: TBitmap;
t: integer;
nbImagesParSec: integer;
procedure TraceAiguille(Init: Boolean);
public
{ Déclarations publiques }
end;
var
Form1: TForm1;
tab: array[0..3, 0..360] of TPoint; //<- augmenté la taille du tableau
// de sorte que le tracé de la flèche ne surchage pas celui de la pointe à cause du NotXor
const DUREE_PARTIE: integer = 4000;
const clAiguille: tColor = clBlue;
implementation
{$R *.dfm}
var a: integer;
procedure TForm1.TraceAiguille(Init: Boolean);
const p: extended = pi / 180;
begin
with Image1.Canvas do
begin
if Init then begin
Pen.Mode := pmNotXor; //
a := trunc(t * 360 / DUREE_PARTIE);
//flèche
Pen.Color := clAiguille; Pen.Width := 3;
MoveTo(Image1.ClientWidth div 2, Image1.ClientHeight div 2);
LineTo(tab[3, a].X, tab[3, a].Y);
//pointe
Brush.Color := clAiguille;
Polygon([tab[0, a], tab[1, a], tab[2, a]]);
end else begin
if t > DUREE_PARTIE then EXIT;
Pen.Mode := pmNotXor;
// Effacement ancienne position :
// flèche
Pen.Color := clAiguille; Pen.Width := 3;
MoveTo(Image1.ClientWidth div 2, Image1.ClientHeight div 2);
LineTo(tab[3, a].X, tab[3, a].Y);
// pointe
Brush.Color := clAiguille;
Polygon([tab[0, a], tab[1, a], tab[2, a]]);
// Tracé dans nouvelle position
a := trunc(t * 360 / DUREE_PARTIE);
// flèche
Pen.Color := clAiguille; Pen.Width := 3;
MoveTo(Image1.ClientWidth div 2, Image1.ClientHeight div 2);
LineTo(tab[3, a].X, tab[3, a].Y);
// pointe
Brush.Color := clAiguille;
Polygon([tab[0, a], tab[1, a], tab[2, a]]);
end;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
var pt: Tpoint;
r, i: integer;
p, c, s: extended;
begin
nbImagesParSec := 10;
Edit1.Text := IntToStr(nbImagesParSec);
pt := point(Image1.ClientWidth div 2, Image1.ClientHeight div 2);
r := Image1.ClientWidth div 2;
p := pi / 180;
for i := 0 to 360 do
begin
SinCos((i - 95) * p, s, c);
tab[0, i] := Point(round(pt.X + (r - 25) * c), round(pt.Y + (r - 25) * s));
SinCos((i - 85) * p, s, c);
tab[1, i] := Point(round(pt.X + (r - 25) * c), round(pt.Y + (r - 25) * s));
SinCos((i - 90) * p, s, c);
tab[2, i] := Point(round(pt.X + r * c), round(pt.Y + r * s));
tab[3, i] := Point(round(pt.X + (r - 28) * c), round(pt.Y + (r - 28) * s));
end;
t := 0;
bmp_Fond := TBitmap.Create;
with bmp_Fond do
begin
Width := Image1.ClientWidth; //Width := Paintbox1.ClientWidth;
Height := Image1.Clientheight; //Height := Paintbox1.Clientheight;
with Canvas do
begin
brush.Style:=bsSolid; brush.Color:=clSilver;
FillRect(ClipRect);
Pen.Width := 4;
for i := 0 to 135 do //clLime -> clYellow
begin
Pen.Color := rgb(round(i * 255 / 135), 255, 0);
MoveTo(Pt.X, Pt.Y); LineTo(pt.X + round((r - 2) * cos((i - 90) * pi / 180)), pt.Y + round((r - 2) * sin((i - 90) * pi / 180)));
end;
for i := 0 to 150 do //clYellow -> $007EFF;
begin
Pen.Color := rgb(255, round(255 - i * 129 / 150), 0);
MoveTo(Pt.X, Pt.Y); LineTo(pt.X + round((r - 2) * cos(((i + 135) - 90) * pi / 180)), pt.Y + round((r - 2) * sin(((i + 135) - 90) * pi / 180)));
end;
for i := 0 to 75 do //$007EFF -> clRed
begin
Pen.Color := rgb(255, round(126 - i * 126 / 75), 0);
MoveTo(Pt.X, Pt.Y); LineTo(pt.X + round((r - 2) * cos(((i + 285) - 90) * pi / 180)), pt.Y + round((r - 2) * sin(((i + 285) - 90) * pi / 180)));
end;
Pen.Color := clBlack;
Pen.Width := 2;
Brush.Style := bsClear;
Ellipse(Image1.ClientRect);
end;
end;
image1.Picture.Bitmap.Assign(bmp_Fond);
TraceAiguille(True);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
bmp_Fond.Free;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
if t > DUREE_PARTIE then timer1.Enabled := FALSE
else begin
inc(t, Timer1.Interval);
TraceAiguille(FALSE);
end;
end;
procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
t:=0;
nbImagesParSec:=StrToIntDef(Edit1.text,10);
timer1.Interval:=round(1000/nbImagesParSec);
timer1.Enabled := TRUE;
end;
end. |
Amélioration sur la rapidité d'une animation
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Envoyé par Basile le disciple
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